(Appendix 6B ) Inventory Costing Methods: Periodic Average Cost Filimonov Inc. has the following information related to purchases and sales of one its inventory items: Assume that Filimonov uses a periodic inventory system. Required: Calculate the cost of goods sold and the cost of ending inventory using the average cost method. (Note: Use four decimal places for per-unit calculations and round all other numbers to the nearest dollar.) Cost of goods sold Cost of ending inventory $X (Appendix 6B ) Inventory Costing Methods: Periodic Average Cost Filimonov Inc. has the following information related to purchases and sales of one its inventory items: Assume that Filimonov uses a periodic inventory system. Required: Calculate the cost of goods sold and the cost of ending inventory using the average cost method. (Note: Use four decimal places for per-unit calculations and round all other numbers to the nearest dollar.) Cost of goods sold Cost of ending inventory $X